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Category
Know exactly what's in the bottle and why it matters.
Quick answer
The Ingredients library is the most thorough English-language reference for skincare actives we know how to build. Each entry breaks down what an ingredient is, the mechanism by which it works, the clinical evidence behind it, who should and shouldn't use it, and how to layer it without canceling other actives.
Retinol, retinal, tretinoin, bakuchiol — every option, decoded.
Every form of vitamin C — LAA, SAP, MAP, THD, glucoside.
The all-rounder vitamin B3, properly explained.
Signal, carrier, neuropeptides — and which actually work.
The exfoliant family from gentlest to strongest.
Hyaluronic acid, glycerin, polyglutamic acid, beta-glucan.
Barrier-repair lipids the skin actually uses.
Pre/pro/postbiotics, ferments, and biome-friendly botanicals.
PDRN, exosomes, EGF, snail mucin, propolis, galactomyces.
Mineral, chemical, and what's actually FDA-approved in the US.
Retinoids photoreact and the degradation is real. The biochemistry behind their PM-only label, the photostable exceptions, and how to apply the rule…
Bakuchiol is marketed as the pregnancy retinol, but the safety data isn't complete. We summarise what's firmly known and where the evidence…
Centella is anti-inflammatory but it isn't a steroid. We compare what each ingredient does and the conditions where one cannot substitute for…
Some SPFs do cause breakouts but it isn't because they're sunscreens. We sort filter chemistry from formulation choices behind acne flare-ups that…
The internet says you must layer water over HA or it dries out your skin. We dug into the lab data, and…
If your sheets have yellow patches, your serum may be the culprit. We explain the oxidation chemistry behind staining and how to…
Salicylic acid isn't universally off-limits for sensitive skin. We cover the four percentages, two pairings, and conditions that make it safe (or…
Cold air, retinol, and a stripped barrier can feel like thinning skin. The truth is the opposite. Here's the cellular science and…
Niacinamide doesn't speed cell turnover, so it technically can't purge. We explain what those breakouts actually are and how to manage them…
Peptides are sold as a plumping miracle. We separate what the research actually shows from the marketing language used on most luxury…
Modern skincare is an ingredient game. Brand names matter less than the molecules inside the bottle, and the brands that succeed are the ones that explain those molecules honestly. The Ingredients library exists because nobody else is doing this work at the depth and clarity it deserves.
Ten subcategories cover the whole field: Retinoids & Bakuchiol (the cell-turnover family), Vitamin C (every form, from L-ascorbic acid to ascorbyl glucoside), Niacinamide, Peptides, Acids (AHA, BHA, PHA), Hydrators (hyaluronic acid, glycerin, polyglutamic acid), Ceramides & Lipids, Microbiome Ingredients (pre/pro/postbiotics, ferments), Korean & Biotech Actives (PDRN, exosomes, snail mucin), and Sunscreen Filters.
Every entry follows the same structure. A 60–90 word quick-answer up top so you can leave with the key facts in 30 seconds. Then the science, in plain English. Then the clinical evidence, with citations and publication dates so you can verify. Pairing rules, side effects, who should avoid, recommended concentrations, and which forms are FDA-approved in the US.
Elelaf is FDA-approved and manufactured in South Korea — the world's most innovative skincare lab ecosystem. We pay close attention to which ingredients are approved where, and which are still under regulatory review (looking at you, exosomes). Our ingredient pages will always tell you the regulatory status, not just the marketing claim.